In "The Prisoner," Turok and Andar meet someone from their own tribe who also wandered into Lost Valley. Part one, "The Mysterious Trail," has them following clues and signs, until they finally find their clansman, captured by a cave tribe. In part two, "The Search To Survive," they join their friend, Crow Plume, and, along with the cave tribe, they try to retrace his steps and find a way out of Lost Valley. If they fail, the cave men promise that they will be slayed.